* Code Orange air quality alert for Wednesday: Unhealthful for sensitive groups *

TODAY’S DAILY DIGIT
A somewhat subjective rating of the day’s weather, on a scale of 0 to 10.

4/10: With the humidity already high, we start to ramp up the heat. The combo has us flirting with triple-digit heat index.

EXPRESS FORECAST

Today: Hot and very humid, 20 percent chance of late-day storm. Highs: Low 90s.
Tonight: Warm and muggy, 20 percent chance of evening storm. Lows: 70s.
Tomorrow: Slightly hotter, still humid, chance of storms. Highs: Low to mid-90s.

View the current weather conditions at The Washington Post headquarters.

FORECAST IN DETAIL

No doubt about it. We have ourselves a solid stretch of classic July heat and humidity. That means highs into the 90s through Saturday, and with the high humidity, we’re looking at heat indexes near or past 100. A thunderstorm or two may briefly cut the heat along the way, before a cool front probably brings a more comfortable Sunday.

Today (Wednesday): Hot and very humid. That’s the story today as morning temperatures rise into and through the 80s, and afternoon highs reach the low 90s under partly sunny skies. The high humidity (dew points mainly in the low 70s) will have afternoon temperatures feeling more like the mid-90s to near 100. A light breeze does little to cool us down. We do have a 20 percent chance of a late afternoon or evening thunderstorm. Confidence: Medium-High

Tonight: Other than a 20 percent chance of an evening thunderstorm, we’re looking at a partly cloudy, muggy and keep-the-AC-running kind of night. Lows settle in the 70s with light winds. Confidence: Medium-High